In-ear headphone



FIG. 1 is a perspective view of an ornamental design for a in-ear headphone, according to the invention.

FIG. 2 is a front view of the in-ear headphone of FIG. 1.

FIG. 3 is a rear view of the in-ear headphone of FIG. 1.

FIG. 4 is a top view of the in-ear headphone of FIG. 1.

FIG. 5 is a bottom view of the in-ear headphone of FIG. 1.

FIG. 6 is a right side view of the in-ear headphone of FIG. 1; and,

FIG. 7 is a left side view of the in-ear headphone of FIG. 1.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for an in-ear headphone, as shown and described. 